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 Microsoft 365

SharePoint External B2B Guest — Access Blocked (Error AADSTS90072)

## Symptom An external guest user attempts to access a shared SharePoint Online file or folder using an authentic invitation link, but the login process fails with a hard stop on a Microsoft "Sorry, but we're having trouble signing you in"... Read More

Adding Permissions to a M365 Calendar via PowerShell

Step# Task Step(s) and / or Screenshot 1 Once connected to an exchange tenant run this command on the calendar in question to see who already has permissions and to verify your work afterward.   Get-MailboxFolderPermission -Identity user1... Read More